-50.68% is the change from 221 to 109
Calculation steps:
[( 109 - 221 ) ÷ 221] x 100 = -50.68%
Formula
Percentage change = [(109 - 221) / 221] x 100
Subtract the new number by the original number
109 - 221 = -112
-112 ÷ 221 = -0.5067873303167421
-0.5067873303167421 x 100 = -50.68%